Magnetic exchange interactions in perovskite solid solutions. Part 1. Iron-57 and1 5 1Eu Mössbauer spectra of EuFe1 –xCoxO3(0 < x < 1)
- 1 January 1983
- journal article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 5,p. 873-878
- https://doi.org/10.1039/dt9830000873
Abstract
The 1 5 1Eu and 57Fe resonances have been used to study magnetic exchange interactions in the orthorhombic perovskite solid solution EuFe1 –xCoxO3(O < x < 1). The replacement of a neighbouring Fe3+ ion by diamagnetic Co3+ ion results in a reduction in the flux density of the supertransferred hyperfine field at the 57Fe nucleus of 1.02 ± 0.05 T extrapolated to 0 K. The 1 5 1Eu resonance is considerably broadened by substitution; this effect is proved to be of magnetic origin, and a detailed model is proposed which explains the data quantitatively. The flux density of the molecular exchange field at the 1 5 1Eu nucleus when a neighbouring Fe3+ atom is substituted by Co3+ is expressed by the exchange constant (β/k)Bo m(0)= 3.2 ± 0.1 K.Keywords
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